Poor Service from Seun and Kobus from Hyundai Hatfield

I would like to express the lack and poor service from Hyundai Hatfield. They sold me a faulty car which had many issues which they don't want to attend or fix.I bought the car in March this year which apparently it was involved in a car accident and they said it was not. I raised all issues I picked up regarding the car with the sales Person whom I've bought the car from (Seun). The car had an engen oil leak before which they didn't want to attend to. They sold the car to me without doing the 125 point check inspection. I had to fight for this to be done. I requested the report after this check was done but it was never sent to me. I asked the 15000Km service report which was not on the book and it was also not sent. The car had a faulty radiator which lead the car to overheating and damaging the whole engen. Its been 4 weeks trying to solve this with Sean and his manager (Kobus). Kobus has been nothing of assistance rather than to telling me that the car was in a good condition when they sold it to me. I paid for something I don't have this month and they don't wanna accept the liability. I received a report from BB Auto Polokwane saying that the previous accident on the car had serious damage to the car and it was not taken to an approved BB panel beater. Kobus and Sean have violated my rights as the customer and they are not even willing to fix the damage caused to me by their dealer. I expected so much from Kobus as he is the manager and I thought I would get a proper assistance. He didn't even try to look at the matter. His excuse was that "Sean is not up to date with his admin and computer" which I must accept. Can the Dealer Principal look at this matter for me?